Madden is described as a black male, 6 feet tall and 140 pounds with brown eyes and black hair. He also has a tattoo on his right arm.

Police are offering a cash reward for the person who provides a tip leading to the capture of Madden.

If you have any information, please call the Prince George's County Police Department's Sex Offender Registry Unit at (301) 583-7128. If you want to remain anonymous, call the Prince George's County Crime Solvers tip line at 1-866-411-TIPS (8477) or go to the Crime Solvers website.